Fast determination of metals using direct analysis of deodorants by inductively coupled plasma optical emission spectrometry

Cosmetics, as deodorants and antiperspirants, nowadays, are considered indispensable in the daily lives of people.1 The concentrations of components in their formulation and the presence of metals may affect human health.2 The multielemental capability of ICP OES has aroused interest in its application for elemental analysis of deodorants. Direct analysis is an efficient alternative for determination of trace elements, reducing risks of losses and contamination, use of reagents and residual generation, contributing to the principles of green chemistry.3 In this context, this work aimed the development of a simple and fast procedure using dilute-andshoot strategy for determination of Al, As, Ba, Cd, Cu, Fe, Mg, Mn, Ni, Pb, Sc, Ti, V, Zn and Zr in nine deodorants samples by ICP OES. The sample preparation was carried out by diluting 1 mL of deodorant sample in 1% (v v-1) HNO3 and the final volume was 10.0 mL. The accuracy of the analytical procedure was evaluated using addition and recovery experiments, and recoveries ranged from 80 to 119%. The limits of detection varied from 0.001 to 0.76 mg kg-1. The maximum concentrations found (mg kg-1) were: Al (0.01 to 7.0%), Mg (0.005 to 1.44), Fe (1.0), Mn (0.1), Ti (1.02), V (0.33), Zn (255) and Zr (0.5), showing wide variation depending on the sample type. The developed procedure was adequate for determining these analytes in routine analysis presenting high sample throughput and demonstrated the feasibility of direct analysis measurements after simple dilution step.